<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>GROOPS - gnssType</title>

    <!-- JQuery and Popper -->
    <script src="https://code.jquery.com/jquery-3.4.1.slim.min.js" integrity="sha384-J6qa4849blE2+poT4WnyKhv5vZF5SrPo0iEjwBvKU7imGFAV0wwj1yYfoRSJoZ+n" crossorigin="anonymous"></script>
    <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>

    <!-- Bootstrap -->
    <!-- https://getbootstrap.com/docs/4.1/examples/ -->
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/js/bootstrap.min.js" integrity="sha384-wfSDF2E50Y2D1uUdj0O3uMBJnjuUD4Ih7YwaYd1iqfktj0Uod8GCExl3Og8ifwB6" crossorigin="anonymous"></script>
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.4.1/css/bootstrap.min.css" integrity="sha384-Vkoo8x4CGsO3+Hhxv8T/Q5PaXtkKtu6ug5TOeNV6gBiFeWPGFN9MuhOf23Q9Ifjh" crossorigin="anonymous">

    <!-- Mathjax -->
    <script type="text/x-mathjax-config">
    MathJax.Hub.Config({tex2jax: {inlineMath: [ ['$','$'] ],
                                  displayMath: [ ["\\[","\\]"] ],
                                  processEscapes: true},
                        TeX:     {Macros: {M: ["{\\mathbf #1}",1]},
                                  equationNumbers: {autoNumber: "all"}  }});
    </script>
    <script async src="https://cdn.jsdelivr.net/npm/mathjax@2.7.7/MathJax.js?config=TeX-AMS_CHTML" integrity="sha384-e/4/LvThKH1gwzXhdbY2AsjR3rm7LHWyhIG5C0jiRfn8AN2eTN5ILeztWw0H9jmN" crossorigin="anonymous"></script>

    <!-- lunr -->
    <script src="https://cdn.jsdelivr.net/npm/lunr@2.3.8/lunr.min.js" integrity="sha384-vRQ9bDyE0Wnu+lMfm57BlYLO0/XauFuKpVsZPs7KEDwYKktWi5+Kz3MP8++DFlRY" crossorigin="anonymous"></script>

    <!-- Mustache -->
    <script src="https://cdn.jsdelivr.net/npm/mustache@4.0.1/mustache.min.js" integrity="sha384-0PLEZVBpOQ+Kqw3anJWSNWvRxpEFt02tSpBvyRsA4WcvX/OTldWdXxGLVLvh954H" crossorigin="anonymous"></script>

    <!-- GROOPS Stylesheet -->
    <link rel="stylesheet" href="static/groops.css"/>

    <!-- icon -->
    <link rel="icon" href="static/groops_icon.png">

</head>
<body>
    <header>
        <nav class="navbar navbar-expand-lg navbar-dark bg-dark">
            <div class="container">
              <a class="navbar-brand" href="index.html"><img class="logo" src="static/groops_white.svg"></a>
              <div class="collapse navbar-collapse" id="mainNavbar">
                <ul class="navbar-nav mr-auto">
                  <li class="nav-item">
                    <a class="nav-link" href="programType.html">Programs</a>
                  </li>
                  <li class="nav-item">
                    <a class="nav-link" href="classes.html">Classes</a>
                  </li>
                  <li class="nav-item">
                    <a class="nav-link" href="general.parser.html">Parser</a>
                  </li>
                  <li class="nav-item">
                    <a class="nav-link" href="general.fileFormat.html">File Formats</a>
                  </li>
                </ul>
              </div>
                <form class="form-inline my-2 my-lg-0" action="search.html" id="searchTools">
                  <input class="form-control mr-sm-2" placeholder="Search" name="searchTerms" method="GET" value="" type="text" id="searchBox">
                  <button class="btn btn-secondary my-2 my-sm-0" type="submit" id="searchButton">Search</button>
                </form>
              <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#mainNavbar" aria-controls="mainNavbar" aria-expanded="false" aria-label="Toggle navigation" style="">
                <span class="navbar-toggler-icon"></span>
              </button>
            </div>
        </nav>
    </header>
    <main class="container px-0 pt-2 top-buffer">
        <div id="content" class="container">
            
<h1 id="gnssType">GnssType</h1><p>
A GnssType string consists of six parts (type, frequency, attribute, system, PRN, frequency number)
represented by seven characters.
<ul>

<li>The first three characters (representing type, frequency, and attribute) correspond to the observation codes of the
      <a href="https://files.igs.org/pub/data/format/rinex305.pdf">RINEX 3 definition</a>.
</li><li>
The satellite system character also follows the RINEX 3 definition:
      <ul>

        </li><li>
<code>G</code> = GPS
        </li><li>
<code>R</code> = GLONASS
        </li><li>
<code>E</code> = Galileo
        </li><li>
<code>C</code> = BeiDou
        </li><li>
<code>S</code> = SBAS
        </li><li>
<code>J</code> = QZSS
        </li><li>
<code>I</code> = IRNSS
      </li></ul>

<li>PRN is a two-digit number identifying a satellite.
</li><li>
Frequency number is only used for GLONASS, where the range -7 to 14 is represented by letters starting with A.
</li></ul>
</p><p>Each part of a GnssType string can be replaced by a wildcard '<code>*</code>', enabling the use of these strings as patterns,
for example to select a subset of observations (e.g. <code>C**G**</code> matches all GPS code/range observations).
Trailing wildcards are optional, meaning <code>L1*R</code> is automatically expanded to <code>L1*R***</code>.
For some RINEX 2 types (e.g. Galileo L5) the RINEX 3 attribute is unknown/undefined and can be replaced by <code>?</code>,
for example <code>L5?E01</code>.</p><p>Examples:
<ul>

<li><code>C1CG23</code> = code/range observation, L1 frequency, derived from C/A code, GPS, PRN 23
</li><li>
<code>L2PR05B</code> = phase observation, G2 frequency, derived from P code, GLONASS, PRN 05, frequency number -6
</li><li>
<code>*5*E**</code> = all observation types, E5a frequency, all attributes, Galileo, all PRNs
</li></ul>

</p>

        </div>
    </main>
</body>
</html>
